The DOI matches its Crossref record; 1 of the 1 references it cites were found in a registry or an index.
Enhanced Activity of Gold-Supported Cobalt Oxide for the Electrochemical Evolution of Oxygen
Abstract
Scanning electron microscopy, linear sweep voltammetry, chronoamperometry, and in situ surface-enhanced Raman spectroscopy were used to investigate the electrochemical oxygen evolution reaction (OER) occurring on cobalt oxide films deposited on Au and other metal substrates. All experiments were carried out in 0.1 M KOH. A remarkable finding is that the turnover frequency for the OER exhibited by ∼0.4 ML of cobalt oxide deposited on Au is 40 times higher than that of bulk cobalt oxide. The activity of small amounts of cobalt oxide deposited on Pt, Pd, Cu, and Co decreased monotonically in the order Au > Pt > Pd > Cu > Co, paralleling the decreasing electronegativity of the substrate metal. Another notable finding is that the OER turnover frequency for ∼0.4 ML of cobalt oxide deposited on Au is nearly three times higher than that for bulk Ir. Raman spectroscopy revealed that the as-deposited cobalt oxide is present as Co(3)O(4) but undergoes progressive oxidation to CoO(OH) with increasing anodic potential. The higher OER activity of cobalt oxide deposited on Au is attributed to an increase in fraction of the Co sites present as Co(IV) cations, a state of cobalt believed to be essential for OER to occur. A hypothesis for how Co(IV) cations contribute to OER is proposed and discussed.
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Citations
Cites
Surface-Enhanced Raman Spectroscopy
Haynes, C. L., McFarland, A. D., & Van Duyne, R. P. (2005) · Analytical Chemistry · doi:10.1021/ac053456d · Cited by 1,144
Cited by
Design of electrocatalysts for oxygen- and hydrogen-involving energy conversion reactions
Jiao, Y., Zheng, Y., Jaroniec, M., & Qiao, S. Z. (2015) · Chemical Society Reviews · doi:10.1039/c4cs00470a · Cited by 5,388
Anantharaj, S., Ede, S. R., Sakthikumar, K., Karthick, K., Mishra, S., & Kundu, S. (2016) · ACS Catalysis · doi:10.1021/acscatal.6b02479 · Cited by 2,503
Chatenet, M., Pollet, B. G., Dekel, D. R., Dionigi, F., Deseure, J., Millet, P., Braatz, R. D., Bazant, M. Z., Eikerling, M., Staffell, I., et al. (2022) · Chemical Society Reviews · doi:10.1039/d0cs01079k · Cited by 2,025
Transition‐Metal (Co, Ni, and Fe)‐Based Electrocatalysts for the Water Oxidation Reaction
Han, L., Dong, S., & Wang, E. (2016) · Advanced Materials · doi:10.1002/adma.201602270 · Cited by 1,769
Gao, M.-R., Xu, Y.-F., Jiang, J., & Yu, S.-H. (2013) · Chemical Society Reviews · doi:10.1039/c2cs35310e · Cited by 1,610
Metadata
- Authors
- Yeo, B. S., & Bell, A. T.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2011-03-17
- Volume
- 133
- Issue
- 14
- Pages
- 5587-5593
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2058267335
- Cited by
- 1,421
- References
- 1
- FWCI
- 18.00
- Type
- journal article
- Language
- en
- Open access
- closed
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